Anyone Dynamat the trunk to reduce exhaust drone? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Russell James · 07-18-2010, 12:12 PM

Has anyone with LT's and a catback lined their trunk with Dynamat? Just wondering if that has had any success in quieting a little exhaust drone.

Mine has kind of a hum, just in 6th gear below 80 mph, that gets a bit annoying if both windows are up. Not a real bad drone that rattles your brain and ears, just kind of an annoying hum. 5th gear sounds great at 75 mph, drop it into 6th and hmmmmmmmm.

I'd rather not mess with the exhaust because it sounds awesome in every other aspect, except 6th gear highway cruising.

TK · 07-18-2010, 12:27 PM

I have a muffler delete (SLP LM I), and decided to dynamat the trunk (just the thinner area around the battery area, as recommended by a car audio place in my town) to get rid of the 6th gear drone.

Honestly, If there is a difference, it ain't much :(

ackeight · 07-18-2010, 12:59 PM

Quote:

Originally Posted by TK

I have a muffler delete (SLP LM I), and decided to dynamat the trunk (just the thinner area around the battery area, as recommended by a car audio place in my town) to get rid of the 6th gear drone.

Honestly, If there is a difference, it ain't much :(

I think if you want to see a bigger difference you would need to do the entire trunk area and sides. Just the battery area doesn't cover all that much. It is a lot more work, but worth it if you don't want to hear it as much.

The 2010 Sin · 07-18-2010, 04:10 PM

it helps a little, I have a full hushmat setup the whole trunk all the floors and decklid and the roof was hushmatted. and I ended up getting rid of my flowmaster catback and going with a magnaflow street. With my longtubes and HF cats and cam swap it was irritating.

DrVonkle · 07-18-2010, 04:23 PM

I have done my entire trunk and honestly there is not much of a difference.

zanodave · 07-18-2010, 10:27 PM

the (matt) is used for vibration dampening,you would want to use MLV mass loaded vinyl,such as luxury liner pro from (SECOND SKIN PRODUCTS)on top of the vibration material. http://www.secondskinaudio.com/produ...Insulation.php a good place for some knowledge

Russell James · 07-19-2010, 09:25 AM

Has anyone had any success with the two layers, vibration and then a mass layer?

Blackbean · 07-19-2010, 07:27 PM

This is related,but not exactly on topic,so forgive me.I saw a website offering a liquid,high viscosity paintable, plyable noise and heat insulator, with incredible results.
Yesterday I saw an ad for another Chevrolet car touting a new liquid sound deadening process.
This bears some research,since the stuff reminded me of Kool Seal,and would be very easy to apply. It dries in a couple of hours.I apologise for not remembering the name, but if I can find it,I will post it.

zanodave · 07-19-2010, 11:06 PM

Quote:

Originally Posted by Russell James

Has anyone had any success with the two layers, vibration and then a mass layer?

Are you still talking about your trunk? if yes, You could do this in stages.

1.one layer of deadening matt ( it may or may not need to be covered 100%, just do the rap test)
2.MLV luxury liner pro at 100%coverage
if this does not meet your expectations they make some stuff like the MLV , only its made of lead
IMO to get the best results you would have to do the whole interior. http://www.sounddeadenershowdown.com/cgi-bin/index.cgi

http://www.raamaudio.com/

http://www.secondskinaudio.com/vibra...lifier-pro.php they also have the sludge

I recently used all of these products in my Tacoma
which is the nosiest truck. i have ever rode in.

epstein · 07-20-2010, 07:18 AM

I did my entire trunk and while I can hear the exhaust note..... The Drone is Gone...... This winter I am gonna remove the back seat and continue where I left off..... I have a 2SS with Borla axle back. I used Mega Mat...and compared to the Dynamat I put in my Avalanche this stuff is thick!
Brian

RobertHarriSS · 07-20-2010, 07:30 AM

I have ARH long tubes with SLP LM II's. I used 1 layer of Fatmat on the entire trunk and it worked great.

MEDISIN · 07-20-2010, 07:50 AM

I ordered the Fatmat trunk kit ($50) today. Heard a lot of good things about it. Will post impressions this weekend and some pics.

Have the full Kooks system (headers, cat, exhaust) and get some drone with the windows up at 1600-1900 RPM under moderate throttle. Hope this will knock it down a notch!

*KILLER74Z28* · 07-20-2010, 09:20 AM

ackeight · 07-20-2010, 03:26 PM

Quote:

Originally Posted by MEDISIN

I ordered the Fatmat trunk kit ($50) today. Heard a lot of good things about it. Will post impressions this weekend and some pics.

Have the full Kooks system (headers, cat, exhaust) and get some drone with the windows up at 1600-1900 RPM under moderate throttle. Hope this will knock it down a notch!

Take before and after videos

07-18-2010, 12:12 PM	#1
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,483	Anyone Dynamat the trunk to reduce exhaust drone? Has anyone with LT's and a catback lined their trunk with Dynamat? Just wondering if that has had any success in quieting a little exhaust drone. Mine has kind of a hum, just in 6th gear below 80 mph, that gets a bit annoying if both windows are up. Not a real bad drone that rattles your brain and ears, just kind of an annoying hum. 5th gear sounds great at 75 mph, drop it into 6th and hmmmmmmmm. I'd rather not mess with the exhaust because it sounds awesome in every other aspect, except 6th gear highway cruising.

07-18-2010, 04:10 PM	#4
The 2010 Sin Dont H8 Me Cuz U Aint Me Drives: 2016 SS Sedan, 2017 Explorer Sport Join Date: Feb 2010 Location: Tulsa, Oklahoma Posts: 2,910	it helps a little, I have a full hushmat setup the whole trunk all the floors and decklid and the roof was hushmatted. and I ended up getting rid of my flowmaster catback and going with a magnaflow street. With my longtubes and HF cats and cam swap it was irritating. __________________

07-20-2010, 07:50 AM	#12
MEDISIN Drives: 2011 CTS-V Sedan Join Date: May 2009 Location: Chapel Hill, NC Posts: 1,505 View My Garage	I ordered the Fatmat trunk kit ($50) today. Heard a lot of good things about it. Will post impressions this weekend and some pics. Have the full Kooks system (headers, cat, exhaust) and get some drone with the windows up at 1600-1900 RPM under moderate throttle. Hope this will knock it down a notch! __________________ 2012 - Present: 2011 CTS-V Sedan, A6, Airaid, Zmax TB and Tune by R.P.M. = 535 hp/503 lb-ft. 2009 - 2012: 2010 2SS RS IBM M6, MGW Shifter, BMR Trailing Arms/Tunnel Brace, Roto-Fab CAI, VMAX Ported TB, Kooks 6511-Complete (Headers, X-Pipe, Mufflers), dyno tuned by R.P.M. = 415 hp/412 lb-ft. "Not giving a f^k is truly the greatest luxury, and no luxury car gives fewer f^k's than a CTS-V." - Matt Hardigree

07-20-2010, 09:20 AM	#13
KILLER74Z28 MOD SQUAD Drives: 2G1FT1EW9A9100666 Join Date: Aug 2006 Location: West Michigan Posts: 5,782 View My Garage	__________________ Who cares about the Blue Oval crowd and their little Ponys? We're getting our Camaro back-and it'll be Supercharged!-MDAII Team LS3

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07-18-2010, 12:27 PM	#2
TK Drives: Black 2SS/RS M6 Join Date: Jul 2009 Location: New Mexico Posts: 152 View My Garage	I have a muffler delete (SLP LM I), and decided to dynamat the trunk (just the thinner area around the battery area, as recommended by a car audio place in my town) to get rid of the 6th gear drone. Honestly, If there is a difference, it ain't much :(

07-18-2010, 04:23 PM	#5
DrVonkle Drives: 2010 Camaro 2SS/RS Join Date: Oct 2009 Location: SoCal Posts: 246	I have done my entire trunk and honestly there is not much of a difference.

07-18-2010, 10:27 PM	#6
zanodave Drives: 06 trailblazer ss Join Date: Oct 2009 Location: so il Posts: 13	the (matt) is used for vibration dampening,you would want to use MLV mass loaded vinyl,such as luxury liner pro from (SECOND SKIN PRODUCTS)on top of the vibration material. http://www.secondskinaudio.com/produ...Insulation.php a good place for some knowledge

07-19-2010, 09:25 AM	#7
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,483	Has anyone had any success with the two layers, vibration and then a mass layer?

07-19-2010, 07:27 PM	#8
Blackbean Drives: 2018 1SS 1LE Join Date: Feb 2010 Location: San Antonio, Fl Posts: 168	This is related,but not exactly on topic,so forgive me.I saw a website offering a liquid,high viscosity paintable, plyable noise and heat insulator, with incredible results. Yesterday I saw an ad for another Chevrolet car touting a new liquid sound deadening process. This bears some research,since the stuff reminded me of Kool Seal,and would be very easy to apply. It dries in a couple of hours.I apologise for not remembering the name, but if I can find it,I will post it.

07-20-2010, 07:18 AM	#10
epstein Account Suspended Drives: SS/RS Join Date: May 2010 Location: Transplanted from NYC..(ret. NYPD).Now in CT Posts: 904	I did my entire trunk and while I can hear the exhaust note..... The Drone is Gone...... This winter I am gonna remove the back seat and continue where I left off..... I have a 2SS with Borla axle back. I used Mega Mat...and compared to the Dynamat I put in my Avalanche this stuff is thick! Brian

07-20-2010, 07:30 AM	#11
RobertHarriSS Drives: 2SS/RS M6 Join Date: Apr 2008 Location: Las Cruces, NM Posts: 382	I have ARH long tubes with SLP LM II's. I used 1 layer of Fatmat on the entire trunk and it worked great.